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Finding the Fourth Proportional to 123,423.61, 170,321.13 and 73,122.61

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Solution

The fourth proportional to 123,423.61, 170,321.13 and 73,122.61 is: 100,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,423.61 : 170,321.13 = 73,122.61 : x
  2. Step 2: Convert to fraction form
    123,423.61/170,321.13 = 73,122.61/x
  3. Step 3: Cross multiply
    123,423.61x = 170,321.13 × 73,122.61
  4. Step 4: Simplify right side
    123,423.61x = 12,454,325,563.75
  5. Step 5: Solve for x
    x = 12,454,325,563.75/123,423.61
  6. Step 6: Final answer
    x = 100,907.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.